India, April 6 -- US President Donald Trump claimed to know exactly how much his signatures would fetch if sold online - or so he told kids at an Easter event at the White House on Monday.

"I could sign autographs for you guys, and then tonight, you could sell them for $25,000 on eBay," he said to the children in attendance.

He also lampooned his predecessor, Joe Biden, over his age while talking to the kids.

"Biden would use the autopen... he was incapable of signing his name, so they'd follow him around with this big machine," he said, as per a video posted on an official X account of the White House.

Trump is 79 years old; Biden was 82 when he dropped out of the last presidential election due to ill health. Biden reportedly used th...