I bought this because another reviewer indicated that it was interchangeable with the hamster play accessories. It is NOT. The hamster play house will not connect and the door will not open if pushed up against the Trail track. I’m sure this would be cute for the seemingly unattainable mouse but the hamster doesn’t work more than 5-10 seconds max on this tiny trail. Just wanted to alert others who might be considering this product as an add-on.Cute little thing for the little liv pets. I missed the part that it didn’t come with a mouse but that was my fault. After getting a mouse, it gets stuck every once in awhile in the cage. However it is worth the money my kids love it.This ended up being the gift of Christmas for my 4.5 year old daughter and niece. They each recieved this toy and have not stopped playing with it. The little mice sometimes flip and do not run the track perfectly and as a parent it seems like a defect. However, it seems to give the kids a reason to touch and interact with the mice briefly and doesnt make them think twice anout the toy. I recommend buying the mouse house attachment with the wheel and mouse. My niece didnt recieve the mouse house and it felt like part of the toy was missing. This toy doesnt come woth a mouse so be sure to buy one separately. I would recommend this toy to a friend.I didn't bother reading reviews on this product because my grand daughter really wanted it. You would think that if the mice were sold separately it would be in big bold print somewhere??!! Why would this be sold and advertised showing mice but the mice are not included??!! Stupid!! I'll accept the hit for being naive enough to believe the mice would actually come with the product,...why wouldn't it?!!But it should be stated more obviously that the mice need to be put based separately. But if they did that I'm sure nobody would bother buying this.Please note THIS DOES NOT COME WITH THE MOUSE! I did buy the mouse separately and what a woot this is. The mouse runs around the track like a nut, but sometimes gets hung up on the walls or ramp. It was funny though! My daughter is still playing with it a week after Christmas so that's a good sign.The product is great but IT DOES NOT INCLUDE A MOUSE! If I had seen it in stores I probably would have read the box but when ordering online, I didn’t look at it closely. Make sure you buy a mouse or hamster separately!In the rush I didn't read the reviews or the item description- I just went off the "About this item" which said "Kids can hold them in their palms to keep them calm or let them go to see them scoot" which implied that a mouse came with it. It does say what is included in the description, but I am very upset that the initial information was not straightforward. As other reviews mention, the actual mice are not easily found unless you want to shell out 50+ for a mouse. Very disappointed in this.Different mice move differently and it makes it hard to have them move through the tracks. Very cute though, daughter love it!don't know who likes these more the kids or the cats but a lovely idea without the hassel of having real onesGreat gift for my 9year old niece she loved itGreat gift for the kids this Christmas. Probably need to buy with extras to make the track a little more interesting.Really disapointed, no mouse included and they are expensive add-on. Not very clear so disapointed when arrived. Seller charging £5 as well as paying postage to return! Not impressed.I originally balked at the price of this track - given the fact that it doesn't even come with one of the mice - but it's exceptionally well made. My girls have been quite rough on it - and it's even gone on a few road trips now. I'm surprised at how well it still fits together, and that none of the parts that snap together have broken off yet.Prod:- Surprisingly durable- Fits together smoothly, makes a good surface for the toy mice- Kids are enthralled with the mice going around in thisCons:- Still seems overpriced