MARYSVILLE – Planting trees has been synonymous with Earth Day since it began in 1970.

So it was not surprising to see a few dozen people planting trees Saturday at the city’s Earth Day celebration at Jennings Park.

Hundreds of orange markers had been placed in a large field next to Allen Creek where trees already had been planted. The goal is twofold: provide shade for the creek to preserve fish, and to soak up potential pollutants in the ground before they reach the creek.

For those more interested in learning than physical labor there were a number of booths with various environmental themes. Kellen Shelton, 3, of Marysville learned about watersheds at a city of Arlington booth.

Kids could play a game where they would learn about a salmon’s life cycle.

The Master Gardeners were there giving out free seeds and handouts are gardening. They also put on a Scavenger Hunt and had a display on pollination.

There was even a game on pet waste disposal. Carlisle of Warm Beach took a try at picking up the pretend dog poop.