Sorry to here you’re having some problems. Unfortunately, the Sparkles won’t light up if they are just powered (they need to receive a signal from the Crumble).
If the software reports ‘Programming Successful’, then the Crumble is probably ok. If you program the Crumble to set a Sparkle to Red in a loop, it will constantly be sending the instruction to the Sparkle:
While this program is running, you can play with the croc leads and battery pack to see if it’s a connection issue.
All the best,