Get together with a couple other groups and do a free car wash in the Church parking lot. That’s right, don’t charge a dime. Instead make flyers or cards that thank them for stopping by your parish, giving them the Mass times and maybe even promoting your upcoming event. Make it as inviting and fun as possible.
You can also choose a mission or something you would like to fund. For people who insist on making a donation, you can thank them and let them you know you have decided to give all donations to this cause (example: food pantry or homeless shelter).
Make sure the youth understand that the car wash is entirely about them giving freely and being a light to the world.
Engage Parents by inviting them to help. It can be a great witness to them as well.