Esplora and Uno together

Hello , I would like to know if it would be possible to use my [u]Esplora as an input for my Uno[/u]. For example : I push one of the buttons on my Esplora and then my Uno (which is connected to some LEDs) will light up one of the LEDs. Is something like this possible? I did some research myself and found some info about SPI , would this be a valid option ?

Yes it can be done. SPI is probably the most appropriate way to get them to communicate.