I had the same problem, I insulated the bottom and sides of the trailer and for several years everything is in order, my children are warm. Children are constantly traveling somnoy and for them I have arranged a wonderful play area with the help of kids chairs tables. They really like to draw and sculpt on the table. When I chose new furniture for them and bought
other table, they chose furniture together with som, it was very exciting and fun. And most importantly, my children are always there.