Fensterpaket

The suction cups actually stick to our sliding glass door and stay put, which I didn't expect. My 6-year-old builds little prisms on the window and the afternoon sun throws rainbows across the kitchen floor. Twenty-four pieces sounds small but it's plenty for two kids to share.

My kids spent an entire rainy afternoon sticking these to the patio door and watching the rainbows move across the kitchen floor. The holographic pieces bend light way more than I expected, and the 24-piece set has enough shapes that two kids can build separately without fighting.

Rainy afternoon saved — my 4-year-old spent an hour rearranging the 24 pieces across the patio door, and the rainbow refractions kept her mesmerized. The suction cups actually hold on glass, which I wasn't expecting. Ten different shapes means the two of them can build without fighting over the same