Not enough money to trade conventional markets in my opinion. Something like wealthfront/betterment in the US or nutmeg in the UK. The problem with only $1000 dollars is that you'll be eaten alive in commissions, the suggestions above cut out that issue with very low yearly fees and enable a fully diversified portfolio.
If you're interested in a crazy gunslinging world where multiple times your investment can be made then I'd suggest cryptocurrencies. Things like bitcoin and now, etherum.
Check out www.coinmarketcap.com, to get a feel for some of the moves.
He could put it into BitMex and trade micro-sized cryptocurrency futures contracts. If you are US, you have to DL the Tor Browser to get on BitMex. You will probably have more fun going to Vegas though. I'd go with a trip or a LT investment.

