Oliver’s weighted blanket seems to be the only thing that will send him to sleep. I don’t know how naps existed prior to our purchasing of one. I love supporting small businesses (and paying less money is a plus, too), so we got ours from the Etsy shop Weighted Creations. This one to be exact: https://www.etsy.com/listing/182119049/weighted-blanket?ref=shop_home_active_15
Do your children use weighted blankets? How do they like them?