Tork paper towel core rocket

thingiverse

This is a toy rocket to build using a core from Tork paper towel roll. It's intended as an activity for kindergarten kids to paint, cut, and assemble. You will need a core pipe from a Tork paper towel roll (they are common across offices in Germany, you can usually get a bunch of these from the cleaning team, as the cores are discarded with paper waste). The core pipe it was designed for has ∅38.5mm internal/ ∅40.5mm external diameter. If your pipe has a differend base internal ID, scale the design by a factor of 100%*real_IDmm/38.5 and it should fit.