Steve Rasmussen This one looks to be a real tough one. I'm not sure that box will hold up to being tossed around in a grandkid's room.
Maybe when they're older...
Packing puzzles (into a box) are seldom easy and not kiddie designed and primary aimed at matures (that's why I make 'em and SWMBO won't let me play with them)... They should be packaged with the first crate of beer when they reach drinking age... or replace the dangling dice in their first car.
The next one in the pipeline is more designed for the youger ones... ones past swallowing age.
If your first cut is too short... Take the second cut from the longer end... LBD