DEAR ABBY: I have a 4-year-old daughter. She spends time at her grandma’s house and does arts and crafts projects there. When my MIL drops her off, she brings the project to our house. We enjoy seeing it for a few days, and my daughter plays with it for a few days. Then it gets added to the rest of her toys. I want to give them back to my MIL, but is it polite to send them? They are genuinely cute projects, so I don’t want to throw them away, but we have too much stuff here. This same dilemma arises with birthday and Christmas gifts. My daughter receives nice gifts, but we don’t want to keep t…