Ellis, who suffers from MECP2 Duplication Syndrome, was given the VIP treatment by Leicester and Football League sponsor Sky Bet, who are backing his dad Richard's campaign to find a cure for the condition.
Text "ellis" was set up at the start of the season, with the goal of raising £100,000 to fund research into the rare genetic condition.
Richard Page is cycling to every Leicester City away game this season - more than 3,500 miles in total - and has currently raised over £26,000.
Ellis met Leicester City stars including Anthony Knockaert, Wes Morgan, David Nugent and manager Nigel Pearson.
Richard, who joined his son on the pitch before the game, said: "What an amazing day!
"We're incredibly grateful to Leicester and Sky Bet for their continued support.
"With their help, and the generosity of football fans up and down the country, we're confident of reaching our £100k target."
Leicester manager Nigel Pearson said: "I'd met Richard before and spoken about the text 'ellis' campaign, so it was good to finally meet Ellis and offer some support.
"I hope we gave Ellis a great Christmas present and something that he will remember for a long time."
To make a donation, text "MECP77" followed by £1, £2, £3, £5 or £10 to 70070 or visit: www.textellis.com