Edit: from the video it looks like it is a bit restricted, but it's a starting point. Maybe if she builds one of these simple games and gets her badge it will encourage her to learn the more in-depth skills needed to really make the one she wants to create. Still a great idea.
Edit: hmmm trying it now with her and I notice that the first stuff is free but then you have to pay to get the full product. I hope this isn't another bloody affiliate revenue thing by the Girl Scouts - these effectively pay-for-badges annoy me. I already have severe issues with the while Girl Scouts cookies thing where they get only 15% commissions on a product that is twice as expensive as equivalent competing product and wouldn't sell at all if it wasn't for this free labor child workforce and the power of cute combined with guilt.