I live in Downingtown and have been taking my daughter (now 3) to 'The Sky's The Limit' playground at Kerr Park since she could walk. She's always loved it.
They have two separate play structures- one is designed for the smaller kids, but she could go on either. They have swings too. In the middle of the playground (has the foam padded 'ground' not loose rubber mulch like Bell Tavern Park that you tried). There is a fire truck structure as well as a castle - and a few dinosaur climbing animals in the middle.
here's a link for it: http://www.ccmomc.org/public/playground.htm