Can someone please help (Just bought a cube)

Hey guys so my 8yo son asked me for another cube even tho we never finished one yet. (Still trying to understand the concept) I didn’t know but I guess he wanted to leave it finished how it comes brand new. However I moved it the blocks a few times and I’m here and don’t know how to get it back to the “finished” cube. Can someone please let me know what to move? Thanks in advance!