Materials needed: Various colors of washable paints (Tempora or finger paints work well). small paint brushes, small plastic wash tubs (one for each pair or they can share), liquid detergent, washcloths, and towels.
Divide your group into pairs. Have one of each pair sit on a table and the other sit on a chair in front of their partner. Then read Isaiah 52:6-7 and/or Romans 10:13-15. Talk a moment about the importance of speading the Word of God to others, describing various ways of doing so. At some point your group may begin to wonder why they are divided as they are. Say, “Now we are going to have a ‘beautiful feet’ contest.” Have the youth sitting on the tables take off their shoes and socks. Give their partners in the chairs the paints and brushes. Then have the seated youth decorate their partners bare feet with the paint; tops, bottoms, toes, up to their ankles. Those who are extremely ticklish will have a hard time holding still. It is a blast to watch. Have a judge determine who has the most ‘beautiful feet’ and award prizes.
Then read John 13:3-5 and 12-15, emphasizing verse 15. (The youth will begin to get the picture real quick.) Then give the seated partners each a small wash tub with warm water, a squirt of detergent, a washcloth and towel. Then… well you get the idea. The seated partners may get a kick out of painting their partners feet, but they may not be as anxious to wash them afterward.
You could talk about how Jesus washes us clean of our sin by His being a servant to us.