Maybe if tgey have just moved in then something of a more practical nature would be welcome? A new fridge freezer, microwave, or a sofa of their choosing, or a smaller item such as a kettle, toaster, new duvet, bedding or even an iron and ironing board maybe? I would also suggest asking them what they would like, or maybe even buying them an Argos store voucher where they could use it to shop on line or add the value towards buying a larger item that they otherwise could not afford.
Young people often have set ideas in what they want for their first home, including colour schemes and styles, and may quickly dispose of or sell on any gifts that dont fit into their plan, hence l find it always better to ask first.