We stayed in Philadelphia for the week and had an extra day to explore outside the city and decided on Morris Arboretum. This place is amazing! Our 2 year old loved exploring the gardens, the birds nest and tree house. And the trains! We absolutely loved the gardens and if you have a few extra hours to spare, I highly recommend making the trip here. Before we got into the gardens we had to pay, $13 each person (I think) and we thought that was pricey but after visiting the gardens, I would pay it again. Pack a cooler for a picnic, tons of benches/chairs to sit. And the staff was very friendly.