That was fast.

After years of contentions that McDonald’s Happy Meals were little more than a vehicle to shamelessly lure kids to junk food with toys, the fast food chain this week decided to try something new: pairing fitness trackers with some of its Happy Meals.

The so-called “Step-it” pedometers, blinking lights and offered in six colors, were supposed to replace the variation of toys that usually accompanies Happy Meals for a limited time in the U.S. and Canada, TIME reported. The company was hoping to freshen its image with a more parent-friendly, health-conscious offering.

“Physical activity is important to everyone of all ages,” a McDonald’s senior executive said of the change. “We very much support children’s well-being.”

Just days later, however, the company said it was pulling the wristbands after customers complained of what may have been skin irritations.

It is not clear how many customers experienced the issue. McDonald’s promptly said it would look into the product.

“We have taken this swift and voluntary step after receiving limited reports of potential skin irritations that may be associated from wearing the band,” the fast food giant told Business Insider in a statement on Wednesday.

“Nothing is more important to us than the safety of our customers and we are fully investigating this issue.”

This article originally appeared on Fortune.com

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