Barnardo's is holding its 14th annual Big Toddle in 2010 and this year's theme is pirates and all things swashbuckling.
One famous face backing the event is Cilla Black, who told the Liverpool Echo everyone should participate if they can.
"Take a picnic along and make a day of it with the grandchildren," she urged.
Big Toddles - which are short sponsored walks for the under-fives - will be taking place at Knowsley Safari Park on July 6th and at Chester Zoo on July 6th to 9th 2010.
However, there will be many more going on around the country and you can even hold your own, perhaps wearing Pirates of the Caribbean fancy dress for the occasion.
Elsewhere, some slightly older children also recently held a costumed sponsored walk for charity
Boarders from St John's Catholic School in Boston Spa donned outfits including Amy Winehouse fancy dress to raise funds for Martin House Hospice earlier this month.