My kids love wall tracks, but they fall down all the time and aren't setup to allow kids to assemble different configurations.
This is a simple adapter to attach hot wheels tracks including wall tracks to mega blocks / other compatible building blocks.
Regular tracks are able to slide-on the end. Wall tracks snap into the plus signs on the face of the adapter. Mega Blocks and other building blocks fit into the bottom.
The track in the picture took about 17 adapters to complete.
I printed with supports, but the bridge is quite small and many printers probably don't require.
1st file is 1 adapter
2nd file is a plate of 4 adapters