Street show? Is that busking or blaining?
Blaining you can use props but they just won't be like the ones you use for busking.
Blaining (I'm not putting him down but its just what we've come to call this type of performing)- Obvious Bat or Raven, Bite out Quarter, Deck of Cards, Sharpie, Pen (or other writing tool) thru dollar, 5 to 1 transpo, and look into Wicker Man By Daniel Greenwolf. A great trick and I gotta promote any one from CT
Busking- Tip Jar or hat, Cards (I use them to draw in), TT, Rope, Scissors, Silks, Cups and Balls, Chains and Handcuffs, Juggling Balls, Balloons and Pump (if you want to do more of a balloon show, I use it for a routine), Sword Swallow, Sly Silks (if I'm packing small but still a great routine).
Now don't forget years of practice, performing, scripting, crying, hearbroken, mocking, family saying they don't want to see any new tricks or old ones that you really really have down now, duck tape, a nice case or table, pa system, love for performing, love and support of friends and family to put up with you and love your dream even tho to most people its kinda silly, passion to sink your heart and soul into something and not just get into it to do some cool card tricks, learning from the great magicians and performers that came before you and studying on not only tricks but real performing, starting at the real begining of magic which is finding out who you are and what your magic-mentalism-clown antics-escapology is saying about you and what your thru line is.
But other then that may be a thread reel and a magicians insurance policy.