Heartwarming behind-the-scenes clip, NFL star Travis Kelce takes sibling love to the next level, feeding his brother Jason like a baby, showing brotherly support for the new cereal baby food

Kelce Mix Cereal, which will be available at grocery stores in September, combines Cinnamon Toast Crunch, Lucky Charms and Reese’s Puffs in one box

Travis Kelce and Jason Kelce are shaking up the cereal aisle, but they can’t shake their hilarious brotherly antics

The NFL pros collaborated with General Mills to create their new Kelce Mix Cereal, and PEOPLE has an exclusive behind-the-scenes look at the pair on set of the campaign shoot.

In the clip, Travis, 34, is wearing a T-shirt that says, “Cereal Training Camp.” With a cereal bowl in one hand and a spoon in the other, the Kansas City Chiefs player coos, “I got the Honey Nut Cheerios choo choo train!

The camera follows Travis as he moves the spoonful of milk and cereal directly into the mouth of Jason, who is in a surprising position. The Philadelphia Eagles alum, 36, is caught halfway through a supersized Cheerio ready to go head first down a slide. Despite his pose, the father of three happily accepts the cereal while the Honey Nut Cheerios mascot watches on.