When people first have dementia they are better off staying in the place they are used to. Anywhere else just confuses them. When they get really bad it doesn't really matter where they are because they do not retain memories any longer. They confuse people with someone else, they often think they are speaking to people who are long dead. It comes with the illness. The people they were disappear and they become someone else themselves. I think when they are in the first stages a photo album is ok, but as they reach the last stages it just confuses them more so best left in the cupboard. Talk to them about general things, flowers in the garden, birds in the trees, find out what they like doing and do that, it might be sticking stamps in an album or something like that. They will not however stick them in the right places so don't expect that. Make allowances, if they forget or repeat things don't get annoyed with them they cannot help it. Most of all do not leave things such as matches or cigarettes around because they could set the house on fire. Don't leave them with boiling pans or open fires. Don't let them near a gas fire. All practical but essential things to remember NOT to do. Let them do their knitting even if they end up with a tangled mess. They will probably want to sleep a lot but as long as someone is with them that is fine.
I have had 3 family members with dementia. It is depressing to see the person you love disappear, but be ready for it. Make sure they take their medicine, and also that they eat something because they will forget. When they get too weak or even aggressive, that is the time to start looking for specialist help because it is impossible to carry on, on your own, without nursing care in the latter stages. Don't get upset at hurtful things they might say because they do not know how hurtful they are being. Just be there for them because they will not be with you for much longer.
It is very hard, I know, I have been there myself 3 times.