My now 3 year old broke his tibia through the growth plate in June of this year, he turned 3 in August. I so feel your pain. The first few days were the worst if that helps at all. He broke his leg is a bounce house at my husbands company picnic. We did not realize it was broken until the next morning when we took him to the pediatrician. It happened on a Sunday late afternoon and we did not realize how bad it was. We thought maybe he sprained his ankle because he was ok as long as we would hold him still, but that night was awful because he kept on moving it in the night and was waking up screaming about every 20 mins or so.
Once he got his cast on, his pain subsided greatly. He would never take any medicine because he hates the taste and is generally a bad medicine taker. He adapted pretty well to the cast. It was a full leg cast because he broke the tibia in the growth plate which is near the knee. It went from his toes to his upper thigh and he was not allowed to put any weight on it for the first 5 weeks which was hard for a active toddler to remember this plus it was the summer and we couldn't go swimming, to the park or ride bikes, it was a long summer! He was finally allowed to walk on it the 6th week and he got it off after the 6th week. During this he would get around by crawling and dragging his leg around behind him. It just killed me and my husband to have to watch him go through this, but he did it like a champ!
When we took him to get his cast off the doctor told us he would just go back to walking normal within a day or so which was not quite what happened and it freaked us out so I wanted to warn you in advance. Once he got the cast off we thought he would be so excited to walk but his leg was very sore and he crawled around for the first couple of days and we really had to encourage him to walk. It took a couple of weeks until he really got back to walking normal again and now I can't even tell he broke that leg. We took him to Chuck E Cheese the day his cast came off to celebrate not realizing how sore he was going to be. It was a long 6 weeks because I also had a 11 month old at the time who was just starting to learn how to walk. I am a nurse so I am suppose to heal people and it was very hard to watch him go through all of it and we felt responsible because we turned away for just a minute when it happened so we are not sure if someone landed on his leg or he just fell on it funny. He had been bouncing all day in it and we had been watching him all day and when it happened there we only 3 other kids in with him and it was a large bounce house.
Needless to say, both he and we are very cautious around bounce houses now. He has bounced on a trampoline and has gone through one of those inflatable obstacle courses, but not a bounce house since. I am still really nervous that he might re-injure that leg, so I am really paranoid. We felt a lot of guilt for a while, but he is back to being his crazy normal 3 year old self now running around with the best of them! I hope this help and contact me if you have any other questions! Good luck and our prayers are with you!