@Anastasia

Small outdoor metal plant stand (50cm height or so) round or with rounded corners

Folding kayak (Oru or similar)

Kids cross country ski boots that fit size US 13T.

Kids cross country skis 120cm or so for a boy (classic)

100cm skis - downhill - for a beginner boy

A lightweight 20" mountain bike for a 6 year old boy - chunky tires and disk brakes, under 20 lbs / under 9kg weight, not rusty... hard tail. Scott Contessa would also work. (brands like Prevelo, Woom, Early Rider perhaps)