An Amelia Earhart theme for 3 yo. The invitations have airplanes saying come give us a hand blowing out the candles with a hand print on the inside of the card and/or airplanes and clouds on the outside and inside of the card too. How about angel food cake with cloud like frosting and ambrosia filling in the middle. They have a variety of blowup airplanes. Those cardboard put-together planes of all sizes, airheads...for goodie bags. The streamers blowing in the wind outside add a nice touch. Everything sky - maybe a sun pinata, or another plane.