As Much Watermelon as You Can Eat/スイカ食べ放題

Today, I went to the Yairo Suika Matsuri (Yairo Watermelon Festival), held on the premises of the Einou Center of JA Uonuma Minami from July 25 through August 10, together with my two children and a friend of my daughter's. There you can eat as much watermelon as you can for 500 yen per adult and 300 yen per elementary school student or under, and there is no time limit! What's more, the watermelons they serve are not ordinary ones but are called "Yairo Suika", which is known for its sweetness and "shari-shari" texture (sorry, I can't put it into English!).
The sad thing is that we were unable to eat as much as we thought we could eat.
今日は、JA魚沼ミナミの営農センターの敷地内で７月25日から８月10日まで行われている「八色西瓜祭り」に、子供２人と娘のお友達と行って来ました。そこでは大人500円、小学生以下300円でスイカを食べ放題でき、時間制限はありません！その上、出してくれるスイカは普通のではなく、甘さとシャリシャリとした食感で知られる「八色（やいろ）スイカ」と呼ばれるものです。
悲しかったことは、自分たちが思うほどは食べれなかったことです。