The bottom swing is similar to the one my dad made for me. However, that one utilized a larger tire and the solid middle part extended further up the back for a back rest. I spent hours in that swing almost every day. Must make one for the grandkiddos!
Expression Swing: Research suggests that bonding is promoted when adults and children make eye contact during play. This unique swing seat encourages eye contact and may be especially helpful for children with social and communication difficulties. Unfortunately the cost of importing the seat from the USA means that it is probably more suited to public parks than private gardens. http://www.gametime.com/expression/