kypf, I feel that taking turns and following 'rules' of play (take off shoes, etc) takes
ability and a certain level of maturity to do so. I am guessing that he has no idea what the rules are beforehand. If you had mentioned bringning him before he went, in his head he might have imagined a glorious undisturbed session of jumping and nonstop fun. Imagine his disappointment when he realises that not only there are bothersome rules to follow (to a 2 yr old, there is no possible way they will be able to understand the importance of removing shoes)and not only that, he has to wait. while watching other kids have fun on his beloved trampoline.
I imagined that he *really truly* adored the activity and simply couldnt help feeling enormous amts of disappointment and sadness when asked to leave the trampoline (temporarily or otherwise, toddlers live in the moment). And in order to not show his disappointment/sadness, he will need a fair amt of self control over his feelings AND knowledge of social rules (that its not socially appropriate to throw screaming/crying fits in public). Considering that the impulse control of a 2 yr old is still not v much developed, this is really a v tall order. (Note: I am talking abt true self discipline, not applicable to cases when tods obey commands from parent due to fear of threat/punishment)
Wanna share with you- a mth ago I brought Faye to this new mall (vicocity heh!) and there was this art shop that lets kids do some painting thingy- squeeze paint onto metal plate than later toast it to become some latex art thing! (Faye's been longing for this forever) That day she was pleading to do it again (takes pretty good fine motor skills, she was too small in the past) and we decided to let her try anyway.
After completing one piece, we told her we needed to go and she *begged* to do another one. But we were in a real rush to be somewhere else and couldnt relent. She threw the one of the *BIGGEST* tantrum ever (I cant recall a tantrum this scale!)! She was thrashing so wildly that there was no way I could pick her up and soon we actually drew a proper crowd surrounding us! Soon I got hb to pick her up ANYWAY (I think she nearly tore his shirt!) cause it was getting unsafe, I was worried she'll hurt herself plus the crowd's stare might be too much for her to handle at that moment (ha, I think my skin v thick these days I wasnt v embarassed!). she continued for nearly 20 running min (in those moments felt like 5 hours to me!) and then finally calmed down.
I offered her water and a small snack and she stared into space quietly for 15 min in a daze (I think her tantrum scared herself badly too). That night when she was happy n comfy, I cuddled her n spoke to her abt, asked wat hes feelings are, we talked abt how disappointment feels and I explained why we couldnt relent that time and so on.
The next time we went there, before I agreed to let her do a piece, I reminded her repeatedly that we had to leave once its over, and how we can go back again following week and so on. Many many times. And it worked. When she was done, she kept saying to herself 'finish! no more! go out now! play other things!' as if to remind herself haha. I was mentally prepared for another major tantrum and I felt that the more I avoid it, the lesser chance she has to learn. Plus the more I avoid it, the more appealing that activity to be to her and much harder to get her to leave when done. (I do know that for you its a diff story, cause u have another little one to care for)
In my personal opinion, yes, this behaviour is a developmentally appropriate thing, and with practise and alot of loving guidance, it will def pass as they grow older and when their inner discipline is more developed.