Mildly Family Friendly Rainforest

My husband and I are looking for a Central American rainforest to visit with our two children (5 and 2.5 yo) at the end of July for about a week. My 5 yo is really into animals. We love to spend time outside, hiking, water play, etc. We visited Black Rock Lodge in Belize a few years ago and loved that place. We liked that they had on-site wildlife tours (night hike!), that it was small hotel, not commercial, and off the beaten path. We're honestly thinking about going back there but don't love the idea of going to the same place again. Costa Rica has come to mind but I'm worried it will feel way too touristy and busy for me, also more expensive. We like nice and clean, max around $300/night. Don't care about super luxury. I'd also like to minimize the travel to a location within 3 hour drive of the airport. Does anyone have other ideas? We have historically been pretty adventurous travelers. TIA!