Can I use my Aiport Express like this?

Here’s my setup:

Time Capsule
Airport Express
Mac Mini

My Time Capsule is the wireless router for the house. The Mac Mini is old and doesn’t have an airport card. Can I set up my Airport Express as a bridge to the Time Capsule and plug the Mini into the Airport Express’s Ethernet port?

If this can be done are there any tricks? My attempts to do this so far have failed.