For under $100, Kritter from Ikea is an affordable option for a children’s bed. The bed was designed by Anna Efverlund of Sweden. The fun blue color of Kritter is a good choice for a boy’s room and an easy color to decorate around. Like other Ikea products, there is assembly required. Measurements: 65″ x 29 ½” x 26 3/8″. Price: $89.99.