They're not happy, but they seem to agree. They go inside for a while, come back, then ask if they can go bike riding. You make sure they all have drinks in their sports bottles, and let them go. They all know their boundaries, and how long they can be gone without calling you, and these three are all good about following those rules so you don't bother reviewing things with them.
When you pick them up, you realize that all three of them are showing early signs of heat stress. You stop and get some (room temperature) water. When you get back home, you get them more to drink, rinse them down, then get them undressed and in the pool, having them continue to drink, though not much at a time.
When they all seem to be feeling better, you dry them off and take them to the twins room. Because they've been drinking cool drinks and all the way in the pool, you have to check their core temperature. None of them are happy about that, but they're smart enough not to make a big fuss.
All their temps are down to normal.
The boys are all saying they're very tired now. Is it nap time or lap time?