"We do our best to be active together but there are always challenges," Ms Ellis said. "I've always had to exercise without Harvey as his wheelchair is not suitable for a long or brisk walk, or over slightly more challenging terrain.
"It would be great to see families exercising and enjoying the community together and removing another barrier to what many may take for granted."
Lisa Reed's 12-year-old Katie, the oldest of three children, was diagnosed with bronchiectasis four years ago.
"Having a child with bronchiectasis has been life-changing," Ms Reed said. "We used to be a very active family, enjoying sports and entering events. Something like the all-terrain buggy would be perfect so we could have the opportunity to partake in family events together again."
NorthAble and the two families are calling on individuals and businesses to boost accessibility for disabled children by donating toward the buggies. People can help through www.givealittle.co.nz/cause/summeroffreedom. Raffle tickets are also being sold at a number of outlets.
Meanwhile, Harvey Ellis is enjoying the great outdoors at home, thanks to Onerahi Lions' and several Whangarei business' support in landscaping the section into a level, safe and exciting play area.
"It has changed Harvey's life," Ms Ellis said.
"It's not only somewhere he can now safely be outside, his friends love coming here to play outside with him."
Harvey and his mum hosted a Grand Prix themed, outdoors afternoon party on Sunday to thank the Lions for the project.