A bigger handle (suited for 3y/o) for the Siku Mega Lifter Crane.
I printed it in two parts to allow more room for fail^Wadjustments while trying to fit the existing crank handle, but it should print just fine as one if you stack the two parts on top of each other.
I also designed a bigger crank handle in case you prefer that over a thumb wheel, but this doesn't have its parameters adjusted to the correct sizes yet. If you print this in two/three parts, you could actually switch forth and back between the crank and the thumb wheel.
Both parts fit tightly when I printed them, but you might want to add a drop of superglue if they don't.