My DDs are 2 and 3.5. Lately every time I take them somewhere nice they play really well, but when it's time to leave they just refuse. I give them a warning and then tell them nicely it's time to go, then say eg if you don't get on your scooter and scoot to the car we'll have to leave it in the park etc.. I usually end up having to carry one or both of them which ends up hurting them as I'm practically dragging them (the eldest is worse and if she wriggles I can't carry her properly). I hate it as by the time they're in the car I'm so furious and I hate being angry with them. This week I slammed DD1s car door really hard (she can't reach it from her seat so wasn't in any danger, I was just so cross) and she got really upset.
I'm not an angry person and I hate that they can push my buttons so well. I don't want to have to start bribing them to get in the car but am seriously considering putting a packet of biscuits in there and tempting them with that as maybe it will get us through this phase without me killing them...