Hydraulic Boxing Bots by Thames & Kosmos #620505 craft The mermaid toy’s tail changes

The mermaid toy’s tail changes from yellow to red as soon as it's placed in cold water

including a burnt hotdog

1 squeegee

Batteries: Requires 2 x AA batteries

The Jellyfish Mood Light operates without any bothersome motor or movement sounds

Hydraulic Boxing Bots by Thames & Kosmos #620505 craft The mermaid toy’s tail changesIn this corner, hailing from the rough and tumble robotics lab: Its Robo Boxer! And in that corner, the wonder from Down Under: Put your mitts together for Kangaroo Bot! Ding! Ding! Jab, dodge, uppercut! These boxing robots use hydraulic power to move like real boxers. Packed with the excitement of a boxing match and the fun of constructing incredible mechanical models, this kit allows you to build two boxing robots and challenge a friend to a match.