A toy loader with an extra big Bucket.
The base is a 35mm x 35mm x 120mm piece of wood.
2x wood screws for fixing the cage to the wood.
4x pieces of 3mm iron rod for the wheels and bucket mechanism.
Everything slides in and holds well. You can always use some CA glue for extra strength. (on mine I didn't use anything - and my son has been playing with it for some times without any problems.)
1x piece of wood with these dimensions: 35mm x 35mm x minimum 90mm (on mine it is 120mm) of length
the cage has been designed to fit a lego type character
your favourite paint color and you're done!
I designed it with Fusion 360