Hey there, Janessis. Thanks for stopping by the Disney Parks Moms Panel with your question.
When my daughter was smaller I really enjoyed
renting a stroller when we arrived at the
Walt Disney World Theme Parks. It was nice not having to unload and load things up to get on the bus before getting to the parks We got there, rented a stroller and setup once for the day! It's definitely the way to go. The strollers for rent at
Walt Disney World are made of a hard plastic but because of the sunshade on top, the seat never gets too hot. If you'd like, you could always bring a beach towel with you from home and throw it in your park day bag. If the seat got too hot you could always lay down the towel so little legs don't get burned. Also, you can get free ice water at any quick service dining location. If the seat were to be unbearable you could always splash a little cold water on it and then wipe it out with your towel.
If you are planning on renting a stroller for multiple days, you can save a little bit of money by renting one for your length of stay. Keep that in mind! I hope this helps give you some ideas on how to keep your stroller cool. If you have any other questions, please feel free to come back and ask.