I bought 3 boxes of these things to help keep my son's train set together. All the good reviews had me hopeful that the product would work.... well it doesn't! It might stay together for an extra 10 minutes but my 3 year old knows how to take it all apart and does. They slide on and off which allows the kids to figure out how to do it in no time at all! Better to get a silicone type of glue and glue it all together. And if we want to add or change it up at some point the silicone peals right off without damaging the tracks. Not worth the money!!