My Generous 4 year old

Me, my husband and Aliya are going to Pangasinan this weekend. When I asked Aliya if she wants to give some of her used toys to her cousins there, she readily agreed, got a plastic bag and started filling it up with her old toys. I like the way she'd mull over a piece of toy, discern if she still needs it, then decides from there. She was able to fill up the whole bag with toys and stickers from her playroom. I know activities like this train her in her generosity, decision making, and not being attached to material things.