I saw this movie when I was a kid I think it was late 80's maybe early 90's and from what I remember is had this kid on a school field trip I guess to this museum I think and he drops his apple near a monster statue and I think the next day or something he turns into that monster.. anyone got any ideas as to what its called?

My Pet Monster

ah you have my thanks I been randomly wondering about that movie for like 2 years now

Glad to help.