There are many plants, but some are only single stems :) she will need to grow them out herself. most of these are moderately fast growing plants, but will build a good collection of different plants for her ^____^
Hygrogryza:
Large floater, fast growing, will help filter water with it's feathery roots. A trye aquatic grass
Frogbit/Dwarf water lettuce/ salvinia/ duckweed:
Floaters, fast growing helps process nutrients but may block out light. Throw out/ give away as needed.
Java moss: a rather stringy moss, medium slow growth (might have other moss mixed in)
Susswassertang: A fern gametophyte, slow growth, can be left floating or attached to something.
Java Feen Trident: When mature, tips of leaves split into three, hence "trident"
Crypt: Hardy plant, medium growth, expect melting due to disturbed roots
Myriophyllum Mattogrossense: fast growing stem plant, really pretty plant
Cardamine Lyrata: Another fast growing stem plant, very nice if tied to the hardscape.
Water wisteria: fast growing stem, I'm sure we all kniw wht this is...
Saggittaria: Long grass like leaves, can surprise you with sudden bursts of growth.
Ludwigia/Rotala: fast growth, Not sure which one, dont ask.... but is pretty and red when given high light.
Microsword: tiny grass like plant, slow growth in low light.
Guppy grass: An extremely fast growing weed like stem plant. best grown bunched (when it does grow out)
Giant baby tear: Not really a hard plant to keep, beautifuly light green an delicate leaves. loves light, best left floating if tank does not have enough light.
Check out the eBook Betta Fish Care Made Easy
Now that I see the plants, am I allowed to say I'm supper jealous! 
