Simply line up peeps around the edge of a vase and add a tea light.
The key for me was not taking the individual peeps apart; just leave them together and they will stand up more easily!
I actually made this vase/candle holder by spray painting a red candle holder I got from Goodwill and added a vase (also from Goodwill) with transparent E6000 industrial strength adhesive. I use it all year round to decorate by filling it with different things depending on the season or upcoming holiday!