Money Walmart’s car seat trade-in event underway through Sept. 21. What you need to know. September 23, 2019Kelly Tyko, USA TODAYComments Off on Walmart’s car seat trade-in event underway through Sept. 21. What you need to know. Walmart is conducting a child car seat recycling event through Sept. 21. If you turn in a seat, you get a $30 Walmart gift card.