The Spurs striker met participants from the Tottenham Hotspur Foundation programme at the Cruyff Court facility and learnt more about how the project has helped the local community.
"It helps me stay active and improve football-wise," said Aaron, who attends the Ferry Lane sessions. "It gives us somewhere to play football for free and they do give us good advice for our future."
The visit had special significance for Janssen, who will donate a Cruyff Court to his hometown of Heesch, in the Netherlands, as part of the award for being Eredivisie's top goalscorer for AZ Alkmaar last season.
"It's good for the youth to play football outside, they have so much fun," Janssen told tottenhamhotspur.com. "It's good for the children."