Kids aged 7+ battle a fearsome nightmare figure in the LEGO DREAMZzz Grimkeeper the Cage Monster (71455) building set. Based on the action that takes place on the DREAMZzz TV show, the set lets kids build the villainous Grimkeeper and then help Mateo and Z-Blob rescue their friend Cooper from his evil clutches before he takes him to the Nightmare King.1 set, 2 adventures. To rescue Cooper from the Grimkeeper, kids can choose between 2 building options. They can build Z-Blob as a mini-planeto confront the villain, or as a hoverbike to pursue and intercept the Grimkeeper and free Cooper when the moments right. This lets kids choose their own path and enjoy double the playtime. Bringing the fun to lifeMinifigures of Mateo and Cooper bring the action to life. Their accessories include a belt, pencil spear and hourglass, which are important to their characters in the TV show.
Kids aged 7+ battle a fearsome nightmare figure in the LEGO DREAMZzz Grimkeeper the Cage Monster (71455) building set. Based on the action that takes place on the DREAMZzz TV show, the set lets kids build the villainous Grimkeeper and then help Mateo and Z-Blob rescue their friend Cooper from his evil clutches before he takes him to the Nightmare King.1 set, 2 adventures. To rescue Cooper from the Grimkeeper, kids can choose between 2 building options. They can build Z-Blob as a mini-planeto confront the villain, or as a hoverbike to pursue and intercept the Grimkeeper and free Cooper when the moments right. This lets kids choose their own path and enjoy double the playtime. Bringing the fun to lifeMinifigures of Mateo and Cooper bring the action to life. Their accessories include a belt, pencil spear and hourglass, which are important to their characters in the TV show.
in 22 offers
The lowest price for LEGO DREAMZzz 71455 Grimkeeper the Cage Monster right now is $37.79 at LEGO.com, compared across 15 retailers.
LEGO DREAMZzz 71455 Grimkeeper the Cage Monster
Kids aged 7+ battle a fearsome nightmare figure in the LEGO DREAMZzz Grimkeeper the Cage Monster (71455) building set. Based on the action that takes place on the DREAMZzz TV show, the set lets kids build the villainous Grimkeeper and then help Mateo and Z-Blob rescue their friend Cooper from his evil clutches before he takes him to the Nightmare King.1 set, 2 adventures. To rescue Cooper from the Grimkeeper, kids can choose between 2 building options. They can build Z-Blob as a mini-planeto confront the villain, or as a hoverbike to pursue and intercept the Grimkeeper and free Cooper when the moments right. This lets kids choose their own path and enjoy double the playtime. Bringing the fun to lifeMinifigures of Mateo and Cooper bring the action to life. Their accessories include a belt, pencil spear and hourglass, which are important to their characters in the TV show.
Kids aged 7+ battle a fearsome nightmare figure in the LEGO DREAMZzz Grimkeeper the Cage Monster (71455) building set. Based on the action that takes place on the DREAMZzz TV show, the set lets kids build the villainous Grimkeeper and then help Mateo and Z-Blob rescue their friend Cooper from his evil clutches before he takes him to the Nightmare King.1 set, 2 adventures. To rescue Cooper from the Grimkeeper, kids can choose between 2 building options. They can build Z-Blob as a mini-planeto confront the villain, or as a hoverbike to pursue and intercept the Grimkeeper and free Cooper when the moments right. This lets kids choose their own path and enjoy double the playtime. Bringing the fun to lifeMinifigures of Mateo and Cooper bring the action to life. Their accessories include a belt, pencil spear and hourglass, which are important to their characters in the TV show.
The all-time low was $37.79 on 10 Aug 2026. That's the lowest price we've ever tracked — a great time to buy.
Prices last updated 2 Nov 2026.
Last updated at 02/11/2026 07:56:41
LEGO DREAMZzz Grimkeeper The Cage Monster 71455 Building Toy Set; 2 Monster Building Options for Kids Aged 7+
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Grimkeeper the Cage Monster
35-day returns
LEGO 71455 DREAMZZZ GRIMKEEPER THE CAGE MONSTER
Delivery $12.95
LEGO Grimkeeper the Cage Monster Set 71455
Delivery between 6–11 Nov $10
Lego Dreamzzz Grimkeeper The Cage Monster 71455 Sealed Inv-1371
Delivery $57.15
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
LEGO DREAMZzz Grimkeeper The Cage Monster 71455
Delivery between 6–16 Nov $9.99
DREAMZzz - Grimkeeper the Cage Monster
Delivery between 4–12 Nov $12.50
LEGO DREAMZzz Grimkeeper the Cage Monster 71455 2-in-1 Build! Ages 7+
Delivery by Fri $5
LEGO DREAMZzz Grimkeeper the Cage Monster Buildable Kids' Toy, Birthday Gift for 7 Year Old Boys and Girls, 71455
Delivery between 6–10 Nov $41
LEGO DREAMZzz 71455 Grimkeeper the Cage Monster
Delivery $12.99
| Brand | LEGO |
| Minimum Age | Ages 7 years and up |
| Number of Pieces | 274 pieces |
LEGO DREAMZzz Grimkeeper The Cage Monster 71455 Building Toy Set; 2 Monster Building Options for Kids Aged 7+
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Grimkeeper the Cage Monster
35-day returns
LEGO 71455 DREAMZZZ GRIMKEEPER THE CAGE MONSTER
Delivery $12.95
LEGO Grimkeeper the Cage Monster Set 71455
Delivery between 6–11 Nov $10
Lego Dreamzzz Grimkeeper The Cage Monster 71455 Sealed Inv-1371
Delivery $57.15
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
| Brand | LEGO |
| Minimum Age | Ages 7 years and up |
| Number of Pieces | 274 pieces |
