How about an apple tree that birdies can sit in ... that grows beautiful ruby red apples ... that can then be pressed into cider for father and daughter whilst shading mother from the sun ... the whole birdie family would be happy!!!
Cricket is their favourite hobby. I thought about sending them somewhere to watch a high profile match but my dad isn't particularly well and last time I booked them tickets for something my mum ended up going with a mate while the old man was in hospital so I shy away from tickets now!
Also, my mum is very superstitious about red. She thinks it is really bad luck so that rules out anything ruby coloured (apart from actual rubies which can be quite pink and therefore acceptable!)