Stopover from Furano to noboribetsu

Hi I'm Travelling with elderly and young children and am wondering if there's a suitable stopover for the drive from Furano to Noboribestu. Cos' realised that the drive is more than 3hrs thus wish to break it up a bit. Thanks!

If you are driving during summer time consider stopping by either Iwamizawa or Yubari, Iwamizawa for the rose garden and Yubari for the famous melon.
http://iwamizawa-park.com/
http://www.yubari-melon.or.jp/

Further south Tomakomai is also worth visiting for its seafood.
http://www.hokkou-p.com/ebook/t/kankoukyoukai/toma-guide_e/_SWF_Window...

Poroto Kotan is the place to learn about the peaceful Ainu people.
http://www.ainu-museum.or.jp/en/

Kani Goten is a good place for a meal break where you can pick your own fresh seafood from water tanks.
http://www.kanigoten.co.jp/

Thank you William5! Yes I'm gg in summer. Will check out the links and see which is the most suitable. :)