On-air competition will support charity’s Kidsmas campaign.
Special product range will feature in stores and windows to raise money for charity.
This year’s Big Toddle week is June 18-24 and will have a nature theme.
Characters to join leading charity event as part of their ongoing partnership.
Special limited edition merchandise will launch in April 2017 in charity’s shops.
TV presenter Louise Redknapp is helping to drive awareness of the promotion.