For our bike tours we use 28 inch and 26 inch Holland style city bikes from Italian manufacturer Alpina.
Bikes have 6 gears and are equipped with comfortable seats, front and rear mudguards, chain-guards. Some of them have basket in the front.
We can also provide 20 inch or 24 inch kids bicycle, bicycle trailer for kids, child seat for the bike (kids up to 20kg) or a bicycle attachment for kids up to 7 years old. Mention that you need it when you book the tour.