DS is 15 months and off the top of the charts tall (height of 19 month old on the 99.6th centile). He's always been a dreadful sleeper. Among all the other potential problems that we haven't solved, he is getting tangled in cot bars a lot when sleeping. He rolls onto his side, puts his arms through, tries to put his legs through (in sleeping bag), gets tangled, wakes up.
Is 15 months too young to put him in a low trundle bed with toddler-bed sides added to it? Wearing a sleeping bag, sometimes with a light blanket over the top, so not with lots of sheets etc to get tangled in.