We have been using this for our 3 year old and it has been great.
https://www.amazon.com/Intex-Kids-Travel-Bed-Set/dp/B0085YGTGW/ref=sr\_1\_9?crid=2QLTGTNPSKJ0Q&keywords=inflatable+kids+bed&qid=1686010225&sprefix=inflatatable+kids+bed%2Caps%2C136&sr=8-9
Intex brand products are sold at many stores. Here are some links to similar products with reviews on Amazon.