On the final Saturday of every April, thousands of Hoosiers head to downtown Indianapolis to attend one of the nation's largest Earth Day festivals.

The Earth Day Indiana Festival combines 140 environmental and conservation exhibits with live music from some of Indiana's best new bands, special activities for kids and good food.

A strong sponsor lineup helped secure a record 140 exhibits in 2011

The quality of exhibits at the Earth Day Indiana Festival improves every year, and this year's lineup is the largest and best ever. Here are sponsors that deserve special recognition.

United Water was our very first partner sponsor, and the company has been part of the festival since 1994.

Indiana's Family of Farmers, also a partner sponsor, did triple duty with a large exhibit, an activity in the children's tent and serving as a food vendor.

All sponsors are listed below.

We can't do the Earth Day Indiana Festival without a strong team of volunteers. It's nice to reward some of you whenever we can.

Kristel Tippen and her husband, Logan, were among our best team of volunteers ever. Krystel's name was drawn to receive an Epiphone guitar donated by the Guitar Center. Four of our volunteers received wonderful gift bags from Whole Foods Markets.

There will be more gifts for volunteers tin 2012, so sign up here today.