Details can be found here.
pdf of cards to date (June 18th, 2020) – link
You can purchase a professionally printed set of all 35 cards at this link. Note that these cards don’t quite work as a complete game (not enough plants!). You could buy a starter deck proper (here) and use your kid’s card as part of an expansion pack.
From Wikipedia:
“Arbor Day (from the Latin arbor, meaning tree) is a holiday in which individuals and groups are encouraged to plant and care for trees. It originated in Nebraska City, Nebraska, United States by J. Sterling Morton. The first Arbor Day was held on April 10, 1872 and an estimated one million trees were planted that day. Many countries now observe a similar holiday. Though usually observed in the spring, the date varies, depending on climate and suitable planting season.”
