Transparenter Röhrenturm

The stacking is so satisfying—each cylinder locks into place just enough that my toddler can build a tower without it toppling every two seconds. Watching the colors blend when we slide one tube inside another has turned into our favorite quiet-time activity.

My niece and I discovered you can nest the smaller cylinders inside the larger ones before stacking, which made the whole tower wobble in a hilarious way. The clear plastic is perfect for watching the colors shift when you hold two different tubes up to the light together.

My toddler spends ages stacking these tubes in different orders, and I love that they’re transparent so she can see the colors change when we put a blue one inside a yellow one. The nesting is smooth and they hold up well to being knocked over constantly.