invention

So yesterday I posted my idea about a self automated cleaning cage that dissolves debris and more, some people liked it and some people did not. Me and my group found out that this idea will not be safe for birds and scratched the idea completely, but we came up with something else for bird...

Hello, so I am in grade 7 and I am doing this thing with my friends in a group called the "invention convention." We needed to come up with an invention that solves a problem, build it, test it and market it. We came up with the idea of a bottom of a bird cage that when the bird throws food or...