<human>:  What is a good outdoor activity I can do with friends on a rainy day?
<bot>: A good outdoor activity you can do with friends on a rainy day is to plan a picnic. Find a spot with a covered area and bring out some food, board games, and blankets. You can also try having an outdoor movie night and set up a projector and a screen next to the covered area. Another fun option could be going for a rainforest adventure. Put on rain boots, jackets, and hats and explore the nearby woods or trails. You can also set up some outdoor games or grab a Frisbee and play a game of Ultimate Frisbee.